DataKeeper for Windows All Documentation - SIOS

Source Server Failure - Manual Switchover to a Target ServerSource Server Failure - Manual Switchover to a Target ServerIn the event the active (source) server fails, DataKeeper allows you to make Server B become the active(source) server. The following actions will occur:1. Server A fails.2. Administrator initiates a switchover to Server B via the "Switchover Mirror" option in the DataKeeperUI.3. Server B deletes the local side of the mirror and creates a new mirror from Server B to Server A.4. The mirror between Server A and Server C is deleted.5. A new mirror is established between Server B and Server C. Because the intent log on the originalsource server (Server A) is not available, a full resync of the volume between Server B and Server C isrequired. The duration of a full resync depends on the size of the drive, server performance andnetwork bandwidth and will usually take a longer time for large amounts of data.6. When Server A comes back up, Server A detects that Server B became the source of the mirror whileServer A was down and Server A automatically becomes the target of the mirror.RESULT• Mirror 1: Server B → A (partial resync when Server A comes back up)• Mirror 2: Server B → C (full resync)DataKeeper for Windows Technical DocumentationPage 106